CN208537701U - A kind of test device of quick detection switch power supply - Google Patents

Abstract

The utility model discloses and provides a kind of test device of quick detection switch power supply, it includes USB communication interface and circuit, high-speed ADC module, electronic load module, ripple measurement module, MCU module, calibration module, the MCU module is separately connected the high-speed ADC module, electronic load module, ripple measurement module, calibration module, the high-speed ADC module is interacted with the MCU module implements voltage data acquisition, the electronic load module is interacted with the MCU module implements DAC setting electric current, the ripple measurement module is interacted with the MCU module implements ADC reading voltage, the calibration module interacts implementation with the MCU module to the high-speed ADC module, electronic load module, ripple measurement module is calibrated.The utility model has high-precision, and low cost, small in size, interface is simple, the advantages that being advantageously integrated, can implement to test to Switching Power Supply to high efficiency fast speed.

Description

A kind of test device of quick detection switch power supply

Technical field

The utility model relates to testing for electrical equipment industries, teaching experiment platform.

Background technique

Power supply requires to do finished product shipment inspection inspection when leaving the factory, and the response of supply voltage, dynamic transmission, Power supply belt are born The test of loading capability, ripple virtual value etc. plays a crucial role guarantee power supply normal work, so the test of power supply Device has biggish market；In the market existing testing scheme and device be substantially needs will be by oscillograph and electronic load To survey Switching Power Supply.These schemes and device have the following disadvantages:

A, integrated level is low: oscillograph, electronic load volume are big, can not be integrated into compact testing facilities；

B, at high cost: oscillograph, electronic load are powerful but cost performance is very low, at high cost；

C, low efficiency: the Switching Power Supply of test single channel output takes around 20 seconds.

It thus solves the disadvantage that existing Switching Power Supply testing scheme exists, designs a small size, low cost is efficient Switching Power Supply universal test device is necessary.

Utility model content

Technical problem to be solved in the utility model is to overcome the deficiencies of the prior art and provide a kind of small size, it is low at This, efficient Switching Power Supply test device.

The technical scheme adopted by the utility model is a kind of test device of quick detection switch power supply, it includes USB Communication interface and circuit, high-speed ADC module, electronic load module, ripple measurement module, MCU module, calibration module, the MCU Module is separately connected the high-speed ADC module, electronic load module, ripple measurement module, calibration module, the high-speed ADC mould Block is interacted with the MCU module implements voltage data acquisition, and the electronic load module is interacted with the MCU module implements DAC Be arranged electric current, the ripple measurement module interact with the MCU module implementation ADC reading voltage, the calibration module with it is described MCU module interaction is implemented to calibrate the high-speed ADC module, electronic load module, ripple measurement module.

The MCU module includes the minimum systematic module of STM32F103RCT6 micro process IC composition, can control the electronics Load blocks carry out the setting of size of current, can control high-speed ADC module, carry out data acquisition and processing (DAP), the energy of supply voltage Ripple detection module is controlled, ripple virtual value is read, can be communicated with memory in the calibration module, be used for calibration factor Access.

The electronic load module includes banana bin interface P1, P2, P3, P4 to test DC-DC conversion circuit, is passed through MCU, which carries out DAC setting, is gradually increased load current, then reads electric power output voltage by high-speed ADC module, checks that voltage is It is no have fall greatly very much or output protection, the load capacity of power supply is detected with this.

The high-speed ADC module is used to test the dynamic transmission response of power supply, and Switching Power Supply makes its bringing onto load when exporting 50% process from 0A to rated current is fallen by the processing voltage-measurable of the high-speed ADC module and the MCU module Amplitude and required time, then make its bringing onto load from rated current 50% to 0A process, pass through the high-speed ADC module and institute The amplitude and the required time and whether overshoot that the processing voltage-measurable of MCU module rises are stated, the high-speed ADC module can be surveyed The voltage for measuring 10mV ~ 20V, after calibration, precision can achieve ± (1%+2mV).

The beneficial effects of the utility model are: it includes USB communication interface and circuit, high-speed ADC due to the utility model Module, electronic load module, ripple measurement module, MCU module, calibration module, the MCU module are separately connected the high speed ADC module, electronic load module, ripple measurement module, calibration module, the high-speed ADC module interact real with the MCU module Voltage data acquisition is applied, the electronic load module is interacted with the MCU module implements DAC setting electric current, the ripple measurement Module is interacted with the MCU module implements ADC reading voltage, and the calibration module interacts implementation with the MCU module to described High-speed ADC module, electronic load module, ripple measurement module are calibrated.So the utility model have high-precision, it is low at This, small in size, interface is simple, the advantages that being advantageously integrated, can implement to test to Switching Power Supply to high efficiency fast speed.

Detailed description of the invention

Fig. 1 is the utility model circuit principle structure block diagram；

Fig. 2 is the utility model MCU module circuit diagram；

Fig. 3 is the utility model USB communicating circuit schematic diagram；

Fig. 4 is the utility model ripple measurement module circuit diagram；

Fig. 5 is the utility model electronic load module circuit diagram；

Fig. 6 is the utility model high-speed ADC modular circuit schematic diagram；

Fig. 7 is the utility model calibration module circuit diagram.

Specific embodiment

As shown in Figures 1 to 7, the utility model it include USB communication interface and circuit, high-speed ADC module 1, Electronic Negative Module 2, ripple measurement module 3, MCU module 4, calibration module 5 are carried, the MCU module 4 is separately connected the high-speed ADC module 1, electronic load module 2, ripple measurement module 3, calibration module 5, the high-speed ADC module 1 interact real with the MCU module 4 Voltage data acquisition is applied, the electronic load module 2 is interacted with the MCU module 4 implements DAC setting electric current, and the ripple is surveyed Amount module 3 is interacted with the MCU module 4 implements ADC reading voltage, and the calibration module 5 interacts implementation with the MCU module 4 The high-speed ADC module 1, electronic load module 2, ripple measurement module 3 are calibrated.

The MCU module includes the minimum systematic module of STM32F103RCT6 micro process IC composition, can control the electronics Load blocks 2 carry out size of current setting, can control high-speed ADC module 1, carry out supply voltage data acquisition and processing (DAP), It can control ripple detection module, read ripple virtual value, can be communicated with memory in the calibration module 5, for calibrating The access of coefficient.

The electronic load module 2 includes banana bin interface P1, P2, P3, P4 to test DC-DC conversion circuit, is led to Crossing MCU progress DAC setting is gradually increased load current, then reads electric power output voltage by high-speed ADC module 1, checks electric Whether pressure, which has, is fallen greatly very much or output protection, and the load capacity of power supply is detected with this.

The high-speed ADC module samples rate is up to 10MHz, and the dynamic transmission for testing power supply responds, and Switching Power Supply is defeated Make when out its bringing onto load from 0A to rated current 50% process, pass through the place of the high-speed ADC module and the MCU module The amplitude and required time that reason voltage-measurable falls, then make its bringing onto load from rated current 50% to 0A process, by described The amplitude and required time and whether overshoot, the height that the processing voltage-measurable of high-speed ADC module and the MCU module rises Fast ADC module can measure the voltage of 10mV ~ 20V, and after calibration, precision can achieve ± (1%+2mV).

In the present embodiment, U6 is the minimum systematic module of STM32F103RCT6 micro process IC composition, can control E_Load Module carries out the setting of size of current；It can control high-speed ADC module, carry out data acquisition and processing (DAP), the control line of supply voltage Wave detection module reads ripple virtual value；It can be communicated with AT24C04 memory, the access for calibration factor.Tested line Wave passes through C78 capacitor, and direct current signal is isolated, and only AC signal can complete RMS by high-precision RMS-DC IC AD8436 To the conversion of DC, in order to improve the measurement accuracy of small signal, it is 10uF that C77 capacitor, which is arranged, in we, and such AD8436 can will turn 10 times of voltage amplification after changing, then the signal of amplification is sent to the sampling of the ADC inside MCU；The module can measure 1mV ~ The RMS of 300mV, after calibration, precision can achieve ± (1%+0.2mV).P1, P2, P3, P4 are test DC-DC conversion electricity The banana bin interface on road, carrying out DAC setting by MCU is gradually increased load current, then reads electricity by high-speed ADC module Source output voltage is checked whether voltage has and fallen greatly very much or output protection, the load capacity of power supply is detected with this；The module volume Power is determined up to 50W, and calibrated rear current precision is up to (1%+1mA).Correction verification module is used to use macrooscillograph and standard When electronic load calibrates high-speed ADC module, ripple detection module and electronic load module 2, three calibration factors are deposited It takes.Correction verification module can be such that the precision of the testing scheme increases.

Claims (4)

1. a kind of test device of quick detection switch power supply, it includes USB communication interface and circuit, it is characterised in that: it is also Including high-speed ADC module (1), electronic load module (2), ripple measurement module (3), MCU module (4), calibration module (5), institute It states MCU module (4) and is separately connected the high-speed ADC module (1), electronic load module (2), ripple measurement module (3), calibrating die Block (5), the high-speed ADC module (1) interacts with the MCU module (4) implements voltage data acquisition, the electronic load module (2) it is interacted with the MCU module (4) and implements DAC setting electric current, the ripple measurement module (3) and the MCU module (4) are handed over Mutually implement ADC and read voltage, the calibration module (5) interacts implementation with the MCU module (4) to the high-speed ADC module (1), electronic load module (2), ripple measurement module (3) are calibrated.

2. a kind of test device of quick detection switch power supply according to claim 1, it is characterised in that: the MCU mould Block (4) is the system module of STM32F103RCT6 micro process IC composition.

3. a kind of test device of quick detection switch power supply according to claim 1, it is characterised in that: the Electronic Negative Carrying module (2) includes banana bin interface P1, P2, P3, P4 to test DC-DC conversion circuit, carries out DAC setting by MCU It is gradually increased load current, then electric power output voltage is read by high-speed ADC module (1), checks whether voltage has and slumps very much It falls or output protection, the load capacity of power supply is detected with this.

4. a kind of test device of quick detection switch power supply according to claim 1, it is characterised in that: the high speed ADC module (1) is used to test the dynamic transmission response of power supply, and Switching Power Supply makes its bringing onto load from 0A to rated current when exporting 50% process, the amplitude fallen by the processing voltage-measurable of the high-speed ADC module (1) and the MCU module (4) and institute The time needed, then make its bringing onto load from rated current 50% to 0A process, pass through the high-speed ADC module (1) and the MCU The amplitude and required time and whether overshoot that the processing voltage-measurable of module (4) rises, the high-speed ADC module (1) can be with The voltage for measuring 10mV ~ 20V, after calibration, precision can achieve ± (1%+2mV).